homeostasis

Question 1

what is homeostasis?

Answer 1

balance used to describe reactions in living things that need to occur in order to maintain balance

Question 2

what type of things does your body that need balance?

Answer 2

cold > temp < Hot

Question 2

glycogenesis

Answer 2

making something > excess glucose that cant be used is stored

Question 3

glycogenolysis

Answer 3

breaks down glycogen when there is not enough glucose for cells

eg: exercise

Question 4

stimulus-response model

Answer 4

A model that describes how a system responds to a stimulus

Question 4

negative feedback loop

Answer 4

a stimulus-response process in which the response counters the stimulus

Question 4

stimulus

Answer 4

an event that can initiate a response

Question 5

receptor

Answer 5

a structure that detects a signal or external change, usually a protein

Question 6

modulator

Answer 6

location where information form receptors is sent to and compared to a sent to and compared to a set point, and where molecules altering the functioning of an effector are released also known as the processing centre

Question 7

effector

Answer 7

A molecule, cell, organ that responds to a signal and produces a response

Question 8

hormone

Answer 8

in order to maintain homeostasis your brain must send or receive signals using chemicals called hormones

Question 9

what is one of the bodys response to regulate body temp?

Answer 9

sweat glands throughout body

=evaporative cooling

Question 10

hormones can?

Answer 10

travel through the blood stream

Question 11

response

Answer 11

the action of a cell, organ, or organism caused by a stimulus

Question 12

thermoregulation

Answer 12

the homeostatic process of maintaining a consistent internal body temperature

Question 13

hypothalamus

Answer 13

a section of the brain that controls the maintenance of the body’s internal environment

Question 14

what happens if your body temp too hot

Answer 14

on a hot day, the hypothalamus sends signals to different effectors which is aimed to increase the amount of heat produced by the body

Question 15

what are effectors of your body temp going up

mulitple answers

Answer 15

> sweat glands produce sweat which evaporates from the skin
small blood vessels vasodilate- increase surface blood flow
the cerebral cortex causes changes in behaviour - such as seeking shade
arrestor pili muscles
cells

Question 16

what are the responses of your body temp increasing ?

muliple answers

Answer 16

> sweating
dilation of arterioles
change in behaviour
chnage in behaviour
flattening of hair
decrease in metablic rate

Question 17

what happens if your body temp too cold

Answer 17

thermpreceptors signals the chnage which signals the hypothalamus which trigger the effectors when the change is detected in temp it triggers number of responses increasing the amount of heat produces by the body

Question 18

what are effectors of your body temp going down

Answer 18

> skeletal muscles- stimulated to move qucikly which increases their metablisim and creates more heat energy
small blood vessels- vasocontriction
the cerebral cortex- behaviour
arrector pili muscles
cells
brown fat

Question 19

what are the responses of your body temp decreasing ?

Answer 19

> shivering
conwtriction of arterioles
change in behaviour
lifting of hair
increasing in metabolic rate
burning of triglycerides